For a Facebook Page sending people to an article, event page, or product page, the useful comparison is not which post gets more reactions. It is whether a native link attachment or an image-led post with the destination in its caption brings more people who take the next step. For example, a Page promoting a workshop could publish one post with the event link preview and another with a workshop image and the same event URL in the caption. Keep the topic, audience, call to action, and posting time as comparable as practical. Before publishing, check the Page composer preview to confirm that one post is a link attachment and the other remains an image post; otherwise, the comparison changes before it starts.
I would give each version a distinct tagged URL leading to the same destination, then compare outbound clicks alongside landing-page visits and a meaningful follow-up, such as registrations or relevant inquiries. Page reactions can describe how people responded in-feed, but they cannot tell you whether the traffic was useful. Run more than one matched pair if possible, and vary which format goes first so one unusually strong day does not decide the result. This is a Page content and measurement question, not a reason to change a campaign objective or assume one format receives better delivery. What measurement setup do you use to judge the tradeoff between clicks and worthwhile follow-up when testing these two Page-post formats?